76results about How to "Reliable positioning" patented technology

The invention discloses a method and a device for installing a battery box of a trolley bus. A sliding installation mode with rollers is adopted; the bottom part and the side surface of a battery box installing frame are respectively provided with casters and side rollers, so that when the battery box is placed in the battery box installing frame, the outer wall of the battery box is contacted with the casters arranged at the bottom part in the battery box installing frame and the side surface, and the sliding with the rollers is realized by the casters arranged at the bottom part in the battery box installing frame and the side rollers at the side surface; simultaneously the lower bottom edge of a pushing port of the battery box installing frame is provided with an automatic locking device; and when the battery box is installed in place, the automatic locking device arranged at the lower bottom edge of the pushing port of the battery box installing frame is automatically bounced up to lock and position the battery box. The two sides of the battery box are provided with guide strips, the installing positions of the guide strips are matched with the positions of the side rollers at the side surface of the battery box installing frame, so that the condition that when the battery box is pushed into the battery box installing frame, the guide strips at the inner sides of the side rollers are just matched with the side rollers for side positioning is ensured.

The invention relates to a positioning method for machining a workpiece and an automatic clamp thereof, wherein the positioning method comprises the following steps: A) selecting a reference surface of the workpiece; B) setting a reference plate, wherein the shape of the surface of the reference plate, which corresponds to the workpiece is in fit with the shape of the reference surface of the workpiece; C) setting a limiting block which is used for limiting the degree of freedom of the workpiece in the corresponding direction; and D) using a movable positioning block to push and press the workpiece to enable the workpiece to abut against the reference plate and form the surface contact. The automatic clamp mainly comprises the reference plate, a limiting part, a supporting part, the movable positioning block and a power system thereof. The automatic clamp for the positioning method can be used for positioning the workpieces in complex shapes or multi-position machining, the clamping is firm and reliable, and the problems of machining errors and the like caused by the deformation of the workpieces can be further avoided.

The invention discloses a novel sensor access bus protocol. In the process of normal inspection, a fire alarm application is sent to an alarm controller by encoding terminal equipment with a fire alarm through a bus; after the application is received by the alarm controller, a fire alarm inspection command is immediately sent to the encoding terminal equipment, and the process of normal inspection is interrupted at the same time; after the fire alarm inspection command is received, an address of the encoding terminal equipment is sent back by the encoding terminal equipment in a fire alarm state through the bus; a normal inspection command is sent to the encoding terminal equipment by the alarm controller in accordance with the received address, so as to confirm whether the encoding terminal equipment is really in the fire alarm state or not; if the encoding terminal equipment is really in the fire alarm state, a fire alarm confirming command is sent to the encoding terminal equipment; and if a response signal of the encoding terminal equipment is in a fire alarm confirming state, the encoding terminal equipment is finally confirmed to be in the fire alarm state. According to the technical scheme, the traditional passive inspection is overcome, an alarm point can be accurately and reliably positioned, a false alarm caused by factors such as environment is avoided, and stability and reliability of bus protocol communication are guaranteed.

The invention discloses a middle frame of a liquid crystal display device and the liquid crystal display device. The middle frame of the liquid crystal display device comprises a connecting portion and a buffer portion, wherein the connecting portion corresponds to an incidence side of the liquid crystal display device, and the buffer portion is fixedly connected with the connecting portion and corresponds to a non-incidence side of the liquid crystal display device. The connecting portion is made of a hard material, and the buffer portion is made of a soft material. The middle frame of the liquid crystal display device can be directly used for clamping a light guide plate and achieving positioning of the light guide plate. Besides, the connecting portion is made of a plastic material which has a certain hardness, the flatness of the whole middle frame can be maintained, the connecting portion corresponds to the position of a light source, and the plastic material has a certain high temperature resistance capability. An existing middle frame is ordinarily formed by plastic injection, the manufacturing cycle of a plastic injection die is long, and the cost of the plastic injection die is high. The connecting portion and the buffer portion can respectively undergo die sinking, a die structure is simplified, and the middle frame is favorable for cost reduction.

The invention discloses a casting cleaning unit which comprises a casting transit exchange mechanism. The casting transit exchange mechanism comprises a bottom support, an exchange platform, an upper support, a drive device and a positioning device. The positioning device comprises an installation plate and at least two ejecting rods. The installation plate is connected to the power output end of the drive device. The upper ends of the ejecting rods are connected to the installation plate. The lower ends of the ejecting rods are right opposite to the exchange platform. A robot system comprises a first robot and a second robot. The first robot is arranged on the feed side of the casting transit exchange mechanism. The second robot is arranged on the discharge side of the casting transit exchange mechanism. The casting cleaning unit is suitable for automatic unit product price multi-procedure conditions, reliable and stable in positioning, suitable for positioning castings of various types, and suitable for being shared by various product parts; the mechanism is simple in structure, low in manufacturing cost and high in cost performance. The invention further discloses a casting cleaning method.

The invention discloses an F-track movable end positioning and connection device for a medium-and-low-speed magnetic suspension turnout. The F-track movable end positioning and connection device comprises two sections of F-track movable ends which are symmetrical left and right. A movable hinged support is fixedly connected with the lower part of the rear end of each of the two sections of F-track movable ends which are symmetrical left and right; each movable hinged support consists of a pair of ear plates, an upper connection plate, a front side plate and a pin roll; the upper connection plate is fixedly connected with the upper ends of the pair of the ear plates and the lower part of the F-track movable end, and the front side plate is fixedly connected with the front end of the pair of the ear plates and the lower part of the upper connection plate; and the pair of the ear plates are inserted into two sides of an extension end of a turnouttrack web of the turnout and are hinged with two sides of the extension end of the turnouttrack web of the turnout through the pin roll, each front side plate is provided with an adjusting screw and the front end of the adjusting screw is pressed against the extension end of the turnouttrack web of the turnout. The left and right freedom degree of the F-track movable end positioning and connection device is limited on the premise that thevertical freedom degree of the device is limited, and the turnout is prevented from swinging left and right and jumping in a vertical direction.

The invention relates to the industry of axle manufacturing, in particular to a turning hole making device which comprises a drilling device and a compressing device. A drilling part is fixed on the drilling device and is connected through a rotary shaft. The compressing device is fixed to a body and the drilling part through studs. The turning hole making device is simple in structure, is more convenient than the traditional machining methods for workpiece clamping and is reliable in positioning. The position of made holes is accurate. Changing the original structure of parts is not needed, detaching a pattern plate and the compressing device is not needed, tool utilization rate can be increased effectively, operation is facilitated for operators, and labor intensity is reduced to a certain degree for workers, time and tool waste is reduced, and cost saving and productivity increasing are combined effectively.

The invention relates to a high-pressure water descaling system. A descaling device comprises a descaling room, an upper surface descaling mechanism, an inner hole descaling mechanism, an outer surface descaling mechanism, a descaling car and a water return channel, wherein one side of the descaling room is provided with a descaling room door, and the bottom of the descaling room is provided with a pair of parallel steel rails; the upper surface descaling mechanism is arranged on the top of the descaling room close to the descaling room; the inner hole descaling mechanism is arranged on the top of the descaling room away from the descaling room door; the outer surface descaling mechanism is arranged in the descaling room opposite to the descaling room door; each surface descaling mechanism respectively comprises descaling spray heads connected respectively through hydraulic transmission; the descaling car is arranged on the parallel steel rails at the bottom of the descaling room and moved left and right between the descaling room door and the outer surface descaling mechanism along the steel rails; a rotating disk is fixedly arranged on the descaling car; and the water return channel is arranged on the lower part of the descaling room and connected with a water circulation pipeline. The system can simultaneously descale an inner surface, an outer surface and an upper surface, has good descaling effect, high speed and better social and economic values and is suitable for generalization and application.

The invention discloses an electric fan with an adjustable pitching angle. A pitching rotating rack is hinged at the upper end of a support frame and can rotate up and down around the support frame; an oscillating mechanism is arranged above the pitching rotating rack and can rotate left and right relative to the pitching rotating rack; an adjusting and locating mechanism is arranged between the support frame and the pitching rotating rack, is used for adjusting and fixing the pitching angle between the support frame and the pitching rotating rack, and comprises a locating block; the locating block is arranged at the bottom of the pitching rotating rack; a plurality of tooth-shaped clamping positions are arranged on the bottom end surface of the locating block; a clamp foot is arranged at the bottom of the support frame and can elastically deform downwards under the action of an external force; and a projection or a groove is arranged on the top end surface of the clamp foot, is matched with tooth-shaped clamping positions to form different pitching angles, and can be clamped in or separated from the tooth-shaped clamping positions along with the elastic deformation of the clamp foot. Compared with a traditional spring ball structure only depending on side locating, the electric fan has the advantages that the effective contact area is large, the locating is more reliable, and meanwhile a user only needs to directly rotate the pitching rotating rack to obtain different pitching angles, so that the operation is convenient.

The invention discloses a welding fixture of automobile control arm mounting support seats. The welding fixture comprises a fixture base, an anti-fault positioning block, a limit block, an L-shaped shaping block, a U-shaped shaping block, a pushing clamp and a fastening pin. The limit block and the anti-fault positioning block which is used for accommodating the control arm mounting support seat are mounted on the fixture base, the fixture base is provided with a fixing seat used for mounting the pushing clamp, the limit block and the fixing seat are respectively located on two sides of the anti-fault positioning block, the L-shaped shaping block and the U-shaped shaping block are mounted on the anti-fault positioning block and are located on two sides of the control arm mounting support seat, the pushing clamp pushes the control arm mounting support seat to move towards the limit block, and the fastening pin penetrates and is clamped tightly through the L-shaped shaping block, the U-shaped shaping block and the control arm mounting support seat. Compared with the prior art, the welding fixture has the advantages that welding fixture has an anti-improper-mounting function, the control arm mounting support seat can be positioned reliably, stabilizing rod support positioning errors caused by unreliable part clamping and positioning are reduced, and errors of assembling size are avoided.

The invention discloses a manual unlocking device of a sliding door of an urban rail vehicle. When a cable pulling disc is rotated to an unlocking position, a stop hook falls in an arc-shaped groove in the cable pulling disc under the effect of torsional springs to be located; when resetting is carried out, a handle is reversely rotated, the diameter of a locating hole in the cable pulling disc is larger than the diameter of a cylindrical locating pin of an unlocking disc, differential motion exists between forward rotation of the unlocking disc and the cable pulling disc and between reversing rotation of the unlocking disc and the cable pulling disc, the differential motion is adopted to enable a slope arranged on the cable pulling disc to support the stop hook to reset a door system locking device, the reliable location is achieved, operation is conveniently achieved, unlocking moment is small, and other assistance movements are avoided; the handle is only required to be rotated directly to achieve manual unlocking and resetting, the unlocking movement is simple and reliable, the structure is novel, the design is ingenious, and the good application prospect is achieved.

The invention discloses an elastic plug structure. A flexible plug is inserted into a fixed sleeve body of the elastic plug structure; a blocking edge which is folded inwards is arranged on the inner end part of the fixed sleeve body; a shaft collar which is matched with the blocking edge in an ejecting pressing way is convexly arranged on the periphery of the flexible plug; a locknut is screwed on the rear end of the fixed sleeve body through threads; a flange which is matched with the rear end face of the fixed sleeve body in the ejecting pressing way is arranged on the rear end of the locknut; a reset spring is sleeved on the flexible plug; the front end of the reset spring is ejected and pressed on the shaft collar; and the rear end of the reset spring is ejected and pressed on the flange. The fixed sleeve body can be fixedly on one of two components which are in mutual slide match; a limit hole is formed in the other component; the flexible plug in the fixed sleeve can stretch into the limit hole so as to limit the two components; the flexible plug is longer and can stretch into the limit hole, so the positioning effect is good; the reset spring can provide force capable of keeping the flexible plug in a non-retractable state for the flexible plug; and the positioning of the elastic plug structure is reliable.

The invention discloses a multistage self-locking and positioning device, wherein multiple through holes are formed in the side wall of a positioning sleeve; positioning pins are arranged in the through holes; screw sleeves are fixedly installed on the outer ends of the through holes; limiting steps are arranged on the positioning pins; springs are installed in the through holes; one end of each spring is pressed against the inner end face of the corresponding screw sleeve; the other end of each spring is pressed against the left end face of the corresponding limiting step; the lower end of a drive rod stretches into a center hole in the positioning sleeve and is fixedly connected with the multistage self-locking and positioning device; the upper end of a screw rod stretches out of the positioning sleeve; a multistage cone dish (3) is provided with multiple cylindrical sections (31) and conical sections (32) at intervals, which are gradually shrunken or amplified from top to bottom or from bottom to top; the right ends of the positioning pins are provided with shafts; pulleys cooperating with the multiple cylindrical sections and conical sections are arranged on the shafts. By the adoption of the multistage self-locking and positioning device, the multistage cone dish is driven through the drive rod, so that the stretching length of each positioning pin is controlled; at the moment, various devices can be positioned quickly; moreover, when a roller moves to the cylindrical sections, the positioning pins implement automatic locking on the roller; therefore, the multistage self-locking and positioning device is flexible to operate and reliable in positioning.

The invention discloses a cylinder fitting based lower limb tibia mechanical axis determination method. The method includes: acquiring a tibia three-dimensional image; fitting the tibia three-dimensional image to obtain a fitted cylinder; acquiring a center line of the fitted cylinder; acquiring a protuberance point at the upper end of tibia; and translating the center line of the fitted cylinderto make it pass through the protuberance point at the upper end of tibia, thus obtaining the lower limb tibia mechanical axis. The method provided by the invention acquires three-dimensional CT tomographic data, fits out the cylinder most similar to the tibial marrow cavity, and then acquires the center line of the cylinder, i.e. a straight line parallel to the mechanical axis of tibia, and then translates the center line to obtain the position of the mechanical axis of tibia, so that the mechanical axis of tibia can be obtained without acquiring the center of ankle joint, and the problems ofpositioning deviation and low positioning accuracy caused by human determination of the center of ankle joint, and by means of image recognition algorithm, a three-dimensional model of the tibial marrow cavity can be worked out automatically, so that the precision can be higher and the positioning is more reliable.

The invention provides a positioning method for inverting a blast furnace shell. According to the positioning method, furnace zones can be reliably aligned and positioned, the method is simple, the operation is easy and the construction is rapid when the blast furnace shell is inverted. According to the positioning method, the furnace shell sequentially consists of a first furnace zone, a second furnace zone,..., a nth furnace zone from bottom to top. The method comprises the following steps of: during inverting, lifting and mounting the nth furnace zone on a furnace frame, lifting the mth furnace zone, and performing butt welding on the mth furnace zone and the (m+1)th furnace zone, wherein m is equal to (n-1), (n-2),..., 2, 1, and n is a natural number; and during aligning and positioning, finding the center of a blast furnace by a cross line pulling method, pulling a suspension wire, and judging the error between the center of the furnace zone and the center of the blast furnace according to the distance from eight outside markers to an outer ring of the furnace zone and the distance from the other end of a short fine line away from the suspension wire to an inner ring of the furnace zone through circling motion of a long fine line and the short fine line around the suspension wire.

The invention belongs to the technical field of aircraft structure design and particularly relates to an aircraft freight cabin door positioning and guiding structure. The structure comprises a cabin door (1), a sliding rail assembly (2) and an uplatch (3). The cabin door (1) is hinged to an aircraft body, the sliding rail assembly (2) is mounted on the aircraft body and the cabin door (1), and the uplatch (3) is mounted on the aircraft body and the cabin door (1). According to the structure, stable and reliable positioning and guiding of the aircraft freight cabin door are achieved.

The invention provides a belt-type feeder which alleviates impact between ratchet teeth and a retaining pawl which rotate along the interval of chain wheels, and prevents tripping out of an electrical component. In the belt-type feeder, the retaining pawl is provided with a blocking surface formed by two planes crossed at a front end direction by a blocking part at the front end; and ratchet teeth form teeth surfaces at interval on a circumferential end surface of the ratchet; the teeth surfaces have two planes which are crossed on a central direction of a shaft of the front end; the angle of the blocking surface of the blocking part is larger than the angle of the teeth surface; and the blocking part is formed that: when blocking with the ratchet teeth at maximum, the distance from a vertex position crossed on the blocking surface to a reference position formed by connecting two intersecting points between the teeth surface and the circumferential end surface of the ratchet is 1/2 longer than the distance from the reference position to the vertex position crossed with the teeth surface.

The invention provides a conveying device for substrates of touch screens, and belongs to the technical field of machines. The conveying device for the substrates of the touch screens solves the technical problems that because substrates are placed flat in an existing feeding and discharging device, dust can easily accumulate on the surfaces of the substrates, and touch marks can be easily left on the surfaces of the substrates. The conveying device for the substrates of the touch screens comprises a rack. The conveying device comprises a box-shaped storage box connected to the rack and a supporting frame located below the storage box, wherein a plurality of strip-shaped concave first positioning grooves are formed in one side in the storage box, a plurality of second positioning grooves are formed in the other side in the storage box, and the first positioning grooves and the second positioning grooves are the same in number and corresponding in position one to one. The conveying device for the substrates of the touch screens further comprises a first driving part, wherein both the first driving part and the supporting frame are located below the storage box, and the first driving part can drive the supporting frame to penetrate through a positioning portion to move vertically. The conveying device for the substrates of the touch screens has the advantages of being wide in application range and capable of achieving the advantages that no dust accumulates on the surfaces of the substrates and the surfaces of the substrates are not touched during transportation.

The invention relates to a circuit board detection device of a remote control. The circuit board detection device comprises a workbench, a supporting column fixed on the workbench, a pressing plate which is movably arranged on the supporting column in a sleeved mode, a fixed support and a detection display screen. The pressing plate is provided with a probe hole used for mounting a detection probe, a positioning table used for fixing a PCB to be detected is arranged under the pressing plate, a conductive bar mounting groove is formed in the upper surface of the positioning table, a conversion PCB which is electrically connected with the conductive bar mounting groove is fixedly arranged on the bottom face of the positioning table, and the conversion PCB is electrically connected with the detection display screen. According to the technical scheme, the circuit board detection device of the remote control has the biggest advantages that the positioning table used for fixing the PCB to be detected is arranged on the workbench, the conductive bar mounting groove matched with the PCB to be detected is formed in the upper surface of the positioning table, so that when the circuit board of the remote control is detected, positioning is more convenient and reliable, when detection personnel operate, the PCB to be detected and the conductive bar mounting groove only need to be matched, and reliable positioning of the PCB can be achieved.

The invention discloses a knitting needle for a tricot machine, which comprises a needle hook, a needle rod, a stitch, a needle end and a needle bed and is characterized in that: the needle rod has a straight or bent plate-like structure; the thickness of the needle rod is constant; the needle hook is arranged on the front end of the needle rod; the needle hook is thin and cylindrical, and the diameter of the needle hook is a little smaller than the thickness of the needle rod; the convex stitch is arranged on the middle part of the needle rod; the long needle end is arranged on the rear end of the needle rod; the planes on two sides of the stitch are the same plane; the needle end is arranged in a positioning groove of the needle bed and has two positioning faces; and the needle bed has two segments of holding grooves. Compared with the prior art, the scheme in the invention has the advantages that: the shortcomings of the knitting needle for the tricot machine are overcome and special positioning steel wires are not used during installation; meanwhile, the knitting needle can be held well by the two segments of the grooves arranged on the needle bed of the tricot machine vertically, so that simple and reliable positioning is realized, holding is stable, and the quality of fabrics can be improved.

The invention discloses molten-loss type brazing auxiliary positioning for an oil cooler. The molten-loss type brazing auxiliary positioning for the oil cooler comprises a clamp body, the oil cooler, an upper clamp body, center positioning, a screw nut and circular hole positioning, wherein the oil cooler is placed on the clamp body and is positioned on the clamp body through the center positioning and the circular hole positioning; and the upper clamp body is tightly pressed on the oil cooler through the screw nut. According to the invention, the molten-loss type brazing auxiliary positioning is used for the center positioning and the circular hole positioning, thus the tightly pressing and the carrying after the oil cooler is assembled can be ensured; and the reliable position can be ensured prior to melting of the solder of a product by brazing, thus the mounting position for the product is ensured to be accurate.

The invention discloses a valve base compression mould of a chlorine gas valve and relates to the technical field of a valve base compression mould tools. The valve base compression mould provided by the invention comprises a valve base basal body and an annular external mould, wherein the lower surface of the annular external mould is provided with steps, and the valve base basal body is matched with the annular external mould and arrange below the annular external mould through the steps; a positioning mould core is arranged in the annular external mould and is arranged above the valve base basal body, and the positioning mould core and the valve base basal body are matched through a rabbet; and a stressing mould pressing sleeve is arranged between the positioning mould core and the annular external mould in a sliding manner, and an annular groove the width of the groove port of which is concurrent with the thickness of the stressing mould pressing sleeve is arranged on the valve base basal body corresponding to the lower end of the stressing mould pressing sleeve. A sealing surface (tetrafluoro ethylene resin part) of the valve base, which is formed by the valve base compression mould through mould pressing and sintering is combined with the valve base basal body firmly without getting loose of falling off, and the sealing surface of the valve base and the valve base basal body are firmly combined together and are corrosion-resistant.

The invention provides a proximal interphalangeal joint structure of a prosthetic finger. The proximal interphalangeal joint structure comprises a proximal interphalangeal joint machine frame (4), a rotating shaft and a worm wheel (2), wherein a motor speed reducer assembly (401), a first bevel gear (402) and a second bevel gear (403) are arranged in the proximal interphalangeal joint machine frame (4); a worm (404) is arranged in the proximal interphalangeal joint machine frame (4) through a circlip for hole (407) and two sliding bearings; the proximal interphalangeal joint machine frame (4) is provided with an opening groove (44); the worm wheel (2) is positioned in the opening groove (44); and the rotating shaft is arranged on the proximal interphalangeal joint machine frame (4) and the worm wheel (2) in a penetrating way. The worm wheel is installed through the opening groove; the rotating shaft is simultaneously arranged on the proximal interphalangeal joint machine frame (4) and the worm wheel in a penetrating way; the opening groove can restrict the worm wheel so that the worm wheel can stably rotate; the worm is arranged through the circlip for hole and the two sliding bearings, so that the worm can flexibly rotate and is reliably positioned; and the work reliability of the proximal interphalangeal joint structure can be improved.

The invention relates to a high-pressure air-cooling roots blower. The high-pressure air-cooling roots blower comprises an enclosure, an impellor, a rotary shaft, a wall board, an oil tank and a gear. The high-pressure air-cooling roots blower is characterized in that an air intake pipe and an air exhaust pipe on the enclosure are respectively perpendicularly welded and fixed on the outer peripheral surface of the enclosure; the air exhaust pipe and the air intake pipe are coaxially distributed; the cross sections of the inlet of the air intake pipe and the outlet of the air exhaust pipe are rhombic; the opening direction of the outlet of the air exhaust pipe is vertically downward; the outlet of the air exhaust pipe is connected with a silencer; the impellor is fixedly connected with the rotary shaft integrally; the rotary shaft is connected with the wall board via a bearing; and the gear is a helical tooth synchronous gear. Further, the gear is connected with the rotary shaft in a key-free mode. The high-pressure air-cooling roots blower guarantees the integral rigidity of the blower and the rotary shaft, and can still run well under the running conditions of high pressure and high flow rate.

The invention provides a carrier tape head end shifting and positioning mechanism for a carrier tape automatic winding and collecting system. The mechanism can solve the problem that a carrier tape cannot be reliably wound due to the fact that the head end of the carrier tape cannot be effectively positioned in an existing system. The mechanism comprises a shifting positioning base plate, a shifting needle and a shifting driving assembly, wherein a winding shaft penetrates through the center of the shifting positioning base plate in a penetrating manner from back to front, a reel is arranged on the extending end of the shifting positioning base plate in front of the winding shaft, a vertical shifting groove is formed in shifting positioning base plate and in the right side of the winding shaft, when the head end of the carrier tape is conveyed into a carrier tape head end limiting hole, the vertical shifting groove communicates with the carrier tape head end limiting hole, the shiftingneedle penetrates through the vertical shifting groove from the back to the front and can extend into the carrier tape head end limiting hole, and when the head end of the carrier tape is conveyed into the carrier tape head end limiting hole through a carrier tape head feeding inlet, the driving assembly can be shifted to drive the shifting needle to move downwards along the vertical shifting groove, and meanwhile, the shifting needle is used for pressing and fixing the carrier tape head end extending into the carrier tape head end limiting hole along the carrier tape head feeding inlet.

The invention relates to a one-way pulley with reliable positioning and its pulley assembly. The inner ring of the pulley is a stepped hole, and the stepped hole is composed of a front support bearing section used to cooperate with the front support bearing, and a single pulley used to cooperate with the one-way clutch. The one-way clutch segment is composed of a rear support bearing segment and a rear support bearing segment for cooperating with the rear support bearing. The hole aperture of the one-way clutch segment is smaller than the hole position aperture of the front support bearing segment and the rear support bearing segment; the pulley assembly of the present invention also includes The mandrel coaxially arranged with the belt pulley, the mandrel is a stepped shaft corresponding to the belt pulley, the shaft section shaft diameter for installing the one-way clutch is larger than the shaft section shaft diameter for installing the front support bearing and the rear support bearing, the belt pulley inner ring of the present invention The outer ring of the mandrel and the mandrel adopts a three-stage structure, which is convenient for the installation of the one-way clutch, and the installation process will not damage the dimensional accuracy of the two ends of the inner ring of the pulley and the outer ring of the mandrel, which ensures the interference after the bearing is pressed, so that The bearings are tightly combined with the inner ring of the pulley and the outer ring of the mandrel.

The invention discloses a plate-type hinge moment balance. The balance comprises: a model end which is of a cuboid structure, is provided with a rectangular groove, and is fixedly connected with a measurement rudder; measuring elements comprising a measuring element I and a measuring element II, wherein the measuring element I is fixedly connected with the model end; and a fixed end which is of a concave structure, and is fixedly installed on the model body, wherein the opening side of the concave structure of the fixed end faces the measuring element II, the fixed end is fixedly connected with the measuring element II, and a partition plate is fixedly connected between the measuring element I and the measuring element II. The front edge of the fixed end is flush with the front edge of the partition plate, and a gap is formed between the inner wall of the fixed end and the partition plate. The advantage that the model is large in axial size along the control surface is fully utilized, and the defect that the radial size along a control surface rotating shaft is small is overcome; the rudder deflection angle is simple to replace and reliable to position; and the five-component hinge moment balance is simple in structure and high in rigidity, measuring elements adopt equal-strength beams, and a strain uniform area is large.

The invention relates to book binding equipment, in particular to a buffering and positioning mechanism of a book sewing machine which comprises a slope track, a book placing board and a pull rod fixed on the frame of the book sewing machine, and a fixing seat, a block track, at least a making leaf spring and a buffer groove block fixed on the book placing board. The pull rod movably supports the book placing board and can move transversally; one end of the pull rod is in contact with the slope track in a sliding manner; a spring is arranged on the pull rod; a guiding plate is arranged at one end of the block track; the block track moves through the guiding plate along the guiding groove in the fixing seat; the other end of the block track is positioned in the buffer groove block fixed on the pull rod; and one end of the making leaf spring is fixed on the fixing seat and the other end is in free state.

The invention discloses a circumferential tooth gap measuring and coloring positioning device for a bevel gear pair. The device comprises a tension shaft, a pressing shaft, a fixing frame, a bearing,an expansion group, and a locking group. The fixing frame is fixedly installed on a shell of an output end speed reducer. The bearing is installed on the fixing frame. The pressing shaft is sleeved with the bearing and extends into an output gear. The tension shaft penetrates through the pressing shaft, is in threaded connection with the pressing shaft, and exceeds the pressing shaft by an end part of the output gear. The expansion group is installed at an over end of the tension shaft and is in expansion with the inner wall of the output gear. The locking group is installed on the fixing frame and the pressing shaft, and locks and positions the axial and radial directions of the pressing shaft. The device has the advantages of being simple and convenient to operate, free of pollution, andcapable of realizing rotation stop positioning and coloring inspection.

The invention discloses an artificial lens forming mold, comprising a male mold and a female mold; the middle of the male mold is provided with a first optical area; the male mold is provided with a positioning terrace rotationally extended along the periphery; the middle of the female mold is provided with a second optical area; the female mold is provided with a positioning groove rotationally extended along the periphery; the height of the positioning terrace is less than the depth of the positioning groove; in closing state, the positioning terrace is inserted into the positioning groove;a clearance between the positioning terrace and the positioning groove forms a liquid residue groove; the rotational axis of the positioning terrace and that of the positioning groove are collinear; the positioning terrace is provided with at least one thru port, one end of the thru port is communicated with the liquid residue groove, and the other end of the thru port is communicated with external air. Surplus reaction liquid in a forming cavity is discharged via the liquid residue groove; the thru port arranged in the positioning terrace enables the liquid residue groove to be communicated with external air, and inner pressure generated by swelling of the reaction liquid is effectively eliminated.